Assessment of genetic variation among four populations of Small East African goats using microsatellite markers

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dc.contributor.authorNguluma, A. S.
dc.contributor.authorZhao, Y.
dc.contributor.authorHuang, Y.
dc.contributor.authorChen, L.
dc.contributor.authorMsalya, G.
dc.contributor.authorLyimo, C.
dc.contributor.authorGuangxin, E.
dc.contributor.authorChenyambuga, S. W.
dc.date.accessioned2021-06-07T17:33:20Z
dc.date.available2021-06-07T17:33:20Z
dc.date.issued2017
dc.descriptionArticleen_US
dc.description.abstractThe majority of goats in Tanzania belong to the Small East African (SEA) breed, which exhibits large phenotypic variation. This study aimed to determine the genetic structure of, and relationships among four populations (Sukuma, Gogo, Sonjo, and Pare) of the SEA breed that have not been studied adequately. A total of 120 individuals (24 from each population) were analysed at eight microsatellite loci. In addition, 24 goats of the South African Boer breed were used as reference. Observed heterozygosity (Ho) ranged from 0.583 ± 0.04 for Sukuma to 0.659 ± 0.030 for Gogo, while expected heterozygosity (He) ranged from 0.632 ± 0.16 for Sukuma to 0.716 ± 0.16 for Boer. Five loci deviated from Hardy–Weinberg equilibrium (HWE) across populations. The mean number of alleles ranged from 4.75 ± 1.58 for Pare to 6.88 ± 3.00 for Sukuma. The mean inbreeding coefficient (F IS ) ranged from 0.003 in Sonjo to 0.148 in Sukuma. The differentiation coefficient (F ST ) was highest (0.085) between Boer and Sukuma and lowest (0.008) between Gogo and Sonjo. The largest genetic distance (0.456) was found between Sukuma and Boer, while the smallest (0.031) was between Gogo and Sonjo populations. Pare, Gogo, and Sonjo populations, formed one cluster, while Sukuma and Boer populations formed two separate clusters. From the findings, it can be concluded that the SEA goats in this study showed high in population genetic variation, which implies that there is good scope for their further improvement through selection within populations. The Sukuma population, which has fairly high inbreeding, is moderately differentiated from Pare, Sonjo, and Gogo goat populations, which showed a high level of admixture. Conservation and improvement strategies of the goats should be designed with first priority being on Sukuma goats. ____________________________________________________________________________________en_US
dc.description.sponsorshipSouth African Journal of Animal Scienceen_US
dc.identifier.issn0375-1589
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/3596
dc.language.isoenen_US
dc.publisherSouth African Society for Animal Scienceen_US
dc.subjectConservationen_US
dc.subjectgenetic diversityen_US
dc.subjectgenetic markersen_US
dc.subjectlocal genetic resourcesen_US
dc.titleAssessment of genetic variation among four populations of Small East African goats using microsatellite markersen_US
dc.typeArticleen_US
dc.urlhttp://www.sasas.co.zaen_US

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